William h



(No Model.)

W. H. BROOK.

CHAIN WRENUH. No. 247,987. Patented 00a 4,1881.

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' UNITED 1 STATES IEyreNT ()FFICEO W ILLIAM H. BROOK, or CORONA, Assienoa or ONE-FOURTH 'ro' JOHN w. ALEXANDER, OF new YORK, N. Y.

"CHAIN-"WRENCH.

SPECIFICATION forming part of Letters Patent No, 247,987, dated October 4, 1881.

Application filed August 5, 1881. (No'model) To all whom it may concern Be it known that I, WILLIAM H. BROOK, a citizen of the United States, residing at C0 rona, in the town ot'-Newtown, in the county 5 of Queens, in the State of New York, have invented anew and useful Chain-Wrench, of which the following is a specification.

The nature of my invention consists of cer-' tain improvements in chain-wrenches used for to tightening or'loo'sening nuts, joints in pipes,

andother-like resistants; and the objects or my improvements are, first, the construction of a wrench wherein is found the possibility of an extra wrench ready for use and without additional cost whenever, by the breakage or wearing out of the teeth of the jaws, a new wrench is required; second, to provide a facile means of connect-ion'of chain with either face of cheek and'its ready readjustment in case of breakage of link or otherwiseythird, to provide a'method for locking and holding taut the chain when power is applied in slots provided in each of; the faces of the shank;and-, fourth, provision fordetachihg thejaws from the shank for repairs, so that when restored or another set substituted the whole appliance is as new at little attendant cost.

Figure 1. 0t theact'ompanying drawings is acentral vertical section of the tool in posi- Fig. 2 is a sideview, and Fig. 3 a front view, of the entire tool. Fig. 4 represents the end view of the invention, and Fig. 5 a side view of thejaw.

Into slots in the cheeksKot' the head of the 5 shank or handle A, Fig. 2, are carefully fitted thejaws B, wherein they are tightly held, so

. as to prevent all lateral motion. Thejaws are firmly secured to the shank and held in place by the assembly-bolt 0, provided with a head 0 and nut, which passes through the head of the shank from onejaw to tlie other, as. shown in Fig. 3. V

The chain M in this invention is made last to the shank by means of the pivot D, Fig. 2,

passing from onech'eek to the other through the end link of the chain.. 7

It is evident by this novel combination that any link of the chain can be thus, utilized as the slot into it. The force is applied by raisemergency by breakage'of link or otherwisev demands. The accompanying drawings show that provision is made for attaching chaiti' to either face of the shank corresponding to the edge of thejaw to be applied.

Each faceot' the shank is made with an elliptical. or link-shaped slot, H, Fig. 3, of a size capable of receiving a link of the chain in its length and breadth, but which is narrowed it the top and bottom, so as at these points to allow only of the introduction of the links edgewise. By this device,when a'link of the chain is dropped into the slot'it is heldin positionand prevented from moving upwardby theresistance offered by the intro'projecting sides, Fig. 3, above it. i

It is also apparent that the increased width of the metal at the lower end where the pivot D passes adds materially to'the strength of the cheeks at that point and to their resisting power.

. Both edges of each of the jaws are toothed, and by simply transposing the pivot D to the other check of shank, Fig. 1, and connecting chain, as before described, either edge of the jaw may be applied.

It is evident that by withdrawing the bolt (3 the jaws may be easily removed from the shank for any purpose desired. f

My wrench, when operated, is placed with the teeth of one edge resting upon the resist-. ing object G, with chain attachedto correspondin g side of shank, asin Fig. 1. The chain is passed under and around the object and locked by dropping the link-pendant opposite ing up the handle or shank. The result is limited only by the power applied and the strength of the materials. t

Aware that prior to my invention wrenches have been made for purposes herein specified, in which the combination of shank,ja'w, and chain exist, I therefore do notclaim such a combination, broadly; but

What I do claim as my invention, and seek to secure by Letters Patent, is-

1. The combination, in a chain-wrench, of 5 the shank A, provided with two pivot-holes, as herein shown, for the interchangeable ad justment of chain from one face to the other,

corresponding to edge of jaws applied, jaws holding thejaws and slotted faces for locking B, the pin D, and chain M, substantially as set the chain, the pin D, and chain M, substanforth. 7 tiall y as and for the purposes'hei'ein described. 10

2. The combination, in a chain-wrench, 0f WILLIAM H. BROOK. 5 two detachable doublejaws, B,\vith both edges Witnesses:

of each jaw serrated 0r teethed, the assembly- ALEXANDER H. WRIGHT, bolt 0, the shank A, with slotted cheeks for l ROSWELL W. KEENE. 

